Systems and methods are described which allow information to be assembled on an application infrastructure topology. This application infrastructure topology may be assembled from information collected on various application infrastructure components in the application infrastructure. Information may be collected on an application infrastructure component in an application infrastructure by examining communications intended for, or originating with, the application infrastructure component. Information may also be collected on an application infrastructure component by querying an agent on the application infrastructure component. By exploiting the protocol of the network, these queries may be issued with a minimum of intrusiveness. The data on the various application infrastructure components may then be aggregated, and information on the application infrastructure topology assembled.